Regulator for ignition systems



July 15, 1924. 1,501,489

J. H. HUNT ET AL REGULATOR FOR IGNITION SYSTEMS Filed July 16 1921 ZZZ E5555 I 70502??? d/d'f w humanl 15, 19.24.

JOHN H. AND JOHN '1'. FITZSIHMONS, F-

ro'N ENGINEERING mnomronms or 0310,

DAYTON, OHIO, ASSIGN'ORS 1'0 THE DAY- COMPANY, or DAYTON, 91310, n OORPORATIOR munnron ron I m IrioN- srsrmrs. 1

, Application filed July 16, 1921. Serial No. 485,356.

- To-aZI whom itmy concern:

Be'it known that we, JoHN H. HUNTSHd- JOHN T. FITZSIMMQNS, citizens of the United States of America, residing at Dayton, county of Montgomery, State of Ohio, have invented certain new and useful Improvements in Regulators for Ignition Systems, of which the following is a full, clear, and exact description. f

This invention relates to high frequency ignition apparatus and has among its ob-= Jects the provision of an ignition system including a high frequency generator, an igni tion' coil and a sparking device connectedthereto, and regulating apparatus tending to render the ignition-uniform Within certain limits of variation of generator speed.

One embodiment of this invention" --is adapted for electrical ignition apparatus for electric motor driven liquid fuel burners, for

' example, that type of liquid fuel burner described in the copending. application of J H. Hunt, Serial No."285, 662, filed March 27, 1919. -In this application there is disclosed a liquid fuel burner to which air is supplied from a blower under pressure for vthe purpose of atomizing the fuel within .Hunt, Seria the burner and for supplying. a blast of air for combustion purposes. This. fuel s ray is ignited by spark from a splark plug aving its electrodes locatedwit in'the'burner. The blower is driven by an electric motor. In the co nding application of J. H. l No. 478,142, filed June 16,

1921, there is disclosed apparatus for providing electrical ignition at the spark plug I withoutrequiring a source of current in addition to the current for operating the motor and without requiring any make and break ap aratus. The motor'is provided with big frequency generating windings which are placed upon the faces of the field v poles of the motor, and a high frequency induction coil or transformer is connected with these windings and with the spark.

plug of the burner.

The present invention is disclosed herein in connection with the apparatuses disclosed in the .copending ap lications referred to, but i s susceptible of other uses.

Other and further objects of the present invention will be apparent from the following descriptiom-ieference being had'to the accompanying drawing, wherein. a pre-' tion .quency transformer coil designate ferred embodiment of is clearly shown.

The figure of the drawing is a wiring diagram of an ignition system showing the regulator in combination therewith consti tuting an embodiment of the'pre'sent inventhe present invention 55 h In the drawing, 20 designates a liquid fuel burnerto which air under pressure is .sup-f plied from a blower, 21. Blower 21 is driven by motor 22in any suitable manner i such as by direct connection or by means of a belt illustrated diagrammatically by the dot and dash line 23. :Burner 20 is provided with spark plug 24, the electrodes of which are located so as to ignite the fuel spray within the burner. As the particular construction of the burner does not constitute a part of the present'invention, it is thought that further description of the burner isunnecessary. The motor 22 includes a' frame 25 supporting for rotation an armature 26 including windings, one of which is shown at 27 and a core 28 provided withopen' slots 29 to'provide aced" teeth 30. The commutator 31 in- '80 c udes preferabl as many segments as there are slots 29 and each of the conductors27 is connected preferably in the same manner spectively, the leading portions of which are 0 provided with slots 38 to form. spaced leadmg pole-f'ace teeth 39. The pitch of the leading pole-face teeth 39 is preferably onehalf thepitch of the armature core teeth 30. Alternate leading pole-face teeth 39 are each 5 rovided with a generatin pole-face wind 1ng'40 and all of the windings 40 are cone nected in series by means ofwires 41 and'42. and ground connections 43 with an inductive regulating circuit 44 and with the primary 10o winding 45 of an ignition coil or lll h freas a whole by the numeral 46. This coilincludes also a secondary winding 47 grounded at 4.3 and connected bywire 48 with the spark lug 24 which is grounded on. the burner 20 aving a connection with ground 43'. The

coil 46 includes also a closed magnetic core 49 one'leg of which is surrounded bylthe regulating inductive circuit This'oirspark plug24 constant In value. This difi'erential relation between windings. 44 and 45 is indicated -diagramma'tically by means of arrows 50 cult iswound diiferentially with respect to theprimary winding 45' so that as the speed of the motor varies to increasethefrequency and voltage of the'primary ignition circuit, the quantity of ignition produced at the will be maintained practically and 51. -The battery 52 is connected by means of a switch 53 with wire 54 leading to field winding 35 which is connected by wire.55

' withmotor brush 56 engaging with commu tator 31. The other motor brush 57 is connected by wire 58 with the motor-field winding 34' which is connected by wire 59. completing the circuit to the battery 52. The

connections are such as toproduce rotation I of the motor armaturef26 in the direction of the arrow 60, when the switch 53 is closed. The motor then will drive the blower 21 to furnish the burner 20' with a spray of fuel and-air for combustion thereof. .As the ar-f mature core teeth rotatepast the poletaco teeth 39, ahi h frequency current will be generated in t eand this current will sparking at the spark plug 24; a In this manner the motor," hich drlves the burner blower, operates as a high ireor the urner ignition apparatus.

The production of the high frequency current in the pole-face windings lsnbe- I lieved to be dueto therapid growth and decay of themagnetic flux in the pole. teeth as the armature teeth pass by. i

In the copending appl-cation of J.- H.

Hunt referred to it was. disclosed that if the entire pole-face area be provided with slots all equally spaced, there would be a great tendency slots 38? to form teeth-.39 which are out of phase with teeth 39 by the angulardistance of one-half the spaclng between teeth 39.

' The s acing'of teeth 39 is the same as teeth 39. o windings are located in slots 38.

The windings 40 are in phase and take ad 1 vantage of armature reaction because 10- with an electric motor mcludmg, pole-tape windings; of a source of current for said cated on the leading portions of the pole faces 36-and 37.

One advantage of the regulator of the I present invention arises iromthe fact that the re later and ignition coil are combined in a smgle structure, the coil and regulator windings having a common ma netic circuit. it. can be readily seen that the apparatus Eole-face windings 4:0 e transformed in the transformer ignition coil 46 to produce uency enerator to provide ignition current amount of ourdisclosed may be combined in a single unit,

it desired. The motor 22 may be connected directly withthe blower 21 and may be supported thereby and the coil and regulator unit 444946 may be mounted upon the generator. This "combination provides a unitary structure which may be conveniently assembled and installed upon any structure to be heated by the burner.

1W here such a burner unitis installed upon an automobile to heat the-engine intake, the current source to run the motor 22would usually be a storage battery varying in vol- 1 tags according to its state of char 0. On account of these and other con itions the speed of the motormight vary. 'Hence such .a regulator is necessary that ignition may be maintained substantially constant, and also so that the core 49 ma not be overheated due to .increasing'the requency of the exciting current above a certainvalue. It is therefore possible to construct the ignition coil or transformer to produce sparking when the battery voltage is low, and which will not put an excessive ignition current load on the motor when "the battery voltage is high. The regulator winding tends to keep uniform the ignition current load onthe motor between certain limits of voltage of the current source. 7

-While the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention, it is to be'understood that other forms might be adopted, all coming within the scope of,

the claims which follow.

What we claim is as follows: 1. In an ignition system, the combination with an electric motor including pole-face windings; of a source of current for said motor a transformeri ition coil connected.

with said pole-face wmdings a spark plug connected with said ignition coil; and means for maintaming' substantially uniform ignition between certain limits of voltage of the current source. i

2. In an ignition system, the combination with an electric motor including pole-face windings; of a source of current for. said motor; a'transformer ignition coil connected with said'pole-face windings a spark plug connected with said ignition coil; and means I for maintaining the ignition current load on 1 the motor substantially uniform between certain limits of voltage oi the current source.

'3. In an ignition system, the combination motor; an ignition coil connected with said pole-face windings; a spark plug connected with said ignition coil: and a regulating inductive circuit energized by said poleface. windings and difierentially related to said ignition coil.

4. In an ignition system, the combination with an electric motor including pole-face windings; of a source of current for said motor; an ignition coil having a primary winding connected in series with said poleface windings, and a secondary winding; a spark plug connected with said secondary winding; and an inductive circuit connected in series with said pole-face windings and with said primary winding and difl'erentially related to said primary winding.

5. In an ignition system, t e combination with an electric motor including pole-face windings; of a source of current for said motor; an ignition coil having a primary windin connected in series with said oleface windings, and a secondary win ing; a spark plug connected with said secondary winding; and an inductive circuit connected in series with said pole-face windings and with said primary winding and diflerentially related to said primary Winding, the ignition coil and inductive circuit having a common magnetic circuit.

6. In an ignition system, the combination with a hi h frequency generator; of an ignition col connected with the generator; and a regulating inductive circuit energized by the generator and separate therefrom and differentially related to the ignition coil.

7. In an ignition system, the combination with a high frequency generator; of an ignition coil having a primary winding connected with the generator and a secondary winding; and an inductive circuit connected in series with the generator ,and primary winding and difi'erentiall related to the primary winding, the ignition coil and inductive circuit having a common magnetic circuit;

In testimony whereof we'he-reto afiix our signatures.

JOHN H. HUNT. I JOHN T. FITZSIMMONS. Witnesses:

.H. E. SOLLENBERGER,

F. J. HARDMAN,. 

